The original message was in the Announcement group (where I'm not allowed to post):

<original>
Abuse of the OpenFOAM download facility.

Some users (including some members of this discussion forum) have been
repeatedly downloading (>10 times per day) OpenFOAM from the download
site. This uses up bandwidth making it costly and slowing legitimate
downloads.

The system is being monitored and those who abuse the system have had
and will continue to have their IP addresses blocked to prevent
further abuse.
</original>

Concerning the download bandwidth: A solution would be, to "outsource" the file downloading to another server. One option would be sourceforge.net.

The provide the "infrastructure" for OpenSource-projects: among other things (CVS-server, Webserver etc) file downloading.

One side-effect would be, that this would raise the "visibility" of this fine project to the outside world.